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Microstructure – Mechanical Properties Relationship of Laser Interference Irradiated Ni/Al Multi-Film

Published online by Cambridge University Press:  01 February 2011

C. Daniel ,
A. Lasagni  and
F. Mücklich
C. Daniel
Affiliation:
Department for Materials Science, Functional Materials, Saarland University, P.O. Box 15 11 50, D – 66041 Saarbruecken, Germany
A. Lasagni
Affiliation:
Department for Materials Science, Functional Materials, Saarland University, P.O. Box 15 11 50, D – 66041 Saarbruecken, Germany
F. Mücklich
Affiliation:
Department for Materials Science, Functional Materials, Saarland University, P.O. Box 15 11 50, D – 66041 Saarbruecken, Germany
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Abstract

Due to the corresponding intermetallic compounds, Ni/Al multi-layered thin film systems are important to protect against the mechanical and chemical impacts on the bulk component. The mechanical properties of these intermetallic compounds, NiAl, can be further improved by combining with other stiff phases. The mechanical properties would be optimized if the lateral surface composite can be made in such a way that the different phases are arranged periodically with a preferred orientation, micro-scaled period and reticulated phase interfaces. Such optimized surface composites have been achieved by laser interference irradiation in a nano-grained structure.

In this study, the thin film systems are produced by physical vapor deposition and subsequently irradiated by the interference pattern of two or more coherent laser beams. The corresponding periodical heat treatment has been analyzed by thermal simulation, and thermal simulation results are compared with the experimental results. Further, the phase transitions during laser interference irradiation are calculated. The structural investigations of irradiated films - grain sizes and deformation by TEM, stress and texture by XRD - are compared with the mechanical properties - hardness and Young's modulus by NI-AFM.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 795: Symposium U – Thin Films - Stresses and Mechanical Properties X , 2003 , U10.4
Copyright
Copyright © Materials Research Society 2004

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